The Sun activity increases during every ...

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1300 years
Solar cycles have an average duration of about 11 years. The periodic changes in the Sun's activity include changes of the levels of solar radiation and the number and size of sunspots.
Katarzyna Dąbrowska
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flagFrance
5%
73%
10%
10%
19
flagAustria
20%
68%
2%
8%
75
flagGreece
20%
60%
5%
15%
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flagthe Netherlands
8%
58%
25%
8%
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flagRepublic of Ireland
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16%
8%
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flagGermany
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14%
15%
416
flagPakistan
12%
54%
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12%
24
flagCanada
19%
52%
14%
14%
21
flagthe United Kingdom
11%
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18%
17%
128
flagSwitzerland
5%
51%
20%
20%
35
flagthe United States
12%
50%
18%
16%
243
flagAustralia
11%
48%
11%
23%
43
flagIndia
19%
44%
13%
21%
383
flagPoland
12%
42%
19%
25%
8121
flagthe United Arab Emirates
20%
40%
6%
33%
15
flagthe Philippines
18%
31%
21%
28%
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flagUnknown
18%
31%
31%
18%
16